The United Nations is at risk of "imminent financial collapse". Secretary-General António Guterres has warned all 193 member states. He said the UN faces a deepening financial crisis. This threatens its ability to deliver key programs. Funds could run out by July. In a letter, Guterres urged members to pay their mandatory fees or change the financial rules to save the UN. The US, the UN's largest contributor, has refused to pay regular and peacekeeping budgets. It also pulled out from many UN agencies, citing "waste of taxpayer dollars." Other countries are also behind on payments or refusing to pay. The General Assembly approved partial financial changes in late 2025. But the cash crunch remains huge. At the Geneva headquarters, financial warnings are visible everywhere. To save cash, escalators are switched off and heating is lowered. Guterres said this crisis is "categorically different" from past ones. He said that several states have formally stopped paying assessed contributions. These fees cover a big part of the budget. He stressed, "The integrity of the entire system" depends on members paying. In 2025, unpaid dues hit a record, 77% of total owed. Another problem is a rule forcing the UN to return unspent funds. Guterres explained, "I cannot overstate the urgency of the situation we now face. We cannot execute budgets with uncollected funds, nor return funds we never received." Each month, the UN returns money it doesn’t have. Recently, $227 million had to be returned despite not being collected. He warned, "Either all member states honour their obligations to pay in full and on time – or member states must fundamentally overhaul our financial rules to prevent an imminent financial collapse." The US President Donald Trump criticized the UN for failing US peace efforts. The US skipped its 2025 regular budget contribution and paid only 30% to peacekeeping. In January, Trump withdrew from 31 UN agencies to "end American taxpayer funding" of globalist agendas. In late December, the US gave $2 billion for humanitarian help, a small part compared to $17 billion spent in 2022. Other countries like the UK and Germany also cut foreign aid, affecting UN work. Guterres called the UN’s financial state its most fragile in years, citing unpaid fees. Trump plans a Board of Peace to work on Gaza rebuilding, possibly replacing some UN roles. The US recently left WHO and failed to pay 2024 and 2025 dues despite legal obligations. Other UN agencies suffer huge cuts. The UN human rights office warns it can no longer document serious violations due to lack of funds. UN Women closed mother and baby clinics in Afghanistan. The World Food Programme cut food rations for Sudan conflict refugees. The UN urgently needs member states to act or faces collapse.